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Rex is Latin for "king", see Rex (title). Specifically, it was the title of the kings of ancient Rome.

The term may also refer to:



Literature and performing arts[edit]

  • Rex (musical), a stage musical, with music by Richard Rodgers and lyrics by Sheldon Harnick





  • SS Rex, an Italian luxury ship, sunk by Allied bombers off the coast of Slovenia in 1944
  • SS Rex, a floating casino off the coast of Southern California from the late 1930s to the late 1940s, run by mobster Anthony Cornero


Energy and fuels[edit]


Computing and technology[edit]

  • The REX prefix used by the x86-64 instruction encoding
  • REXX (originally named Rex), a computer programming language
  • .rex (disambiguation) file extensions used by REXX and REX2
  • REX 5000, a series of personal digital assistants
  • REX 6000, a series of personal digital assistants
  • Rex (software), a remote execution, configuration management and software deployment system
  • Rex (video game), a 1988 game for the ZX Spectrum and Amstrad CPC
  • REX, an audio file format; see REX2
  • REX OS, a real-time operating system developed by Qualcomm
  • Samsung REX, a series of affordable feature phones
  • REX, an abbreviation for "request to exit", a push-button or motion detector used for access control

Fictional characters[edit]


Animated television series[edit]

  • Rex Banner, a one-time character in The Simpsons appearing in the episode "Homer vs. the Eighteenth Amendment"
  • Rex Raptor, a recurring character in the 4kids version of Yu-Gi-Oh!
  • Rex Salazar, the main title character from the animated show Generator Rex
  • Rex, the title character in the claymation series Rex the Runt
  • Captain Rex, the clone trooper captain who served as General Anakin Skywalker's second-in-command in the series Star Wars: The Clone Wars

Live-action television series[edit]

Other fiction[edit]

Other uses[edit]

See also[edit]